Product Overview

The Pentair 98209800 High-Flow Manual Air Relief Valve is a genuine OEM replacement assembly designed for compatible Pentair pool and spa filters. Installed at the top of the filter tank, this valve allows trapped air to be safely released from the filtration system during startup, priming, and routine maintenance.

Air can accumulate inside a pool filter after the pump has been turned off, the filter has been opened, or the plumbing system has lost prime. Releasing this trapped air helps the filter fill completely with water and supports safe, consistent system operation.

The high-flow design allows air to escape quickly through the manual relief outlet. This replacement assembly is commonly used when the original valve is cracked, leaking, difficult to operate, clogged, or no longer sealing correctly.

Part 98209800 is compatible with many Pentair cartridge and D.E. filters, including select Clean & Clear, Clean & Clear Plus, FNS Plus, Quad D.E., EasyClean, Predator, Warrior, and 4000 Series models. Always confirm the filter model and original part number before ordering.

Key Features

• Genuine Pentair OEM replacement part
• High-flow manual air-release design
• Releases trapped air from the filter tank
• Helps safely depressurize the filter before servicing
• Compatible with select Pentair cartridge and D.E. filters
• Direct replacement for damaged or leaking assemblies
• Manual operation requires no electrical connection
• Durable construction for outdoor pool environments
• Provides convenient access during startup and maintenance
• Helps maintain proper filter operation

Benefits

• Allows trapped air to escape quickly
• Supports safer filter startup and maintenance
• Helps prevent air from remaining inside the filter tank
• Replaces leaking, cracked, or difficult-to-operate valves
• Genuine OEM design provides proper fit and compatibility
• Restores convenient filter-pressure management
• Extends the usable life of the existing filter

Specifications

Compatible Filter Series

The Pentair 98209800 is commonly used with compatible models from the following filter families:

• Pentair Clean & Clear
• Pentair Clean & Clear Plus
• Pentair Predator
• Pentair Warrior
• Pentair EasyClean D.E.
• Pentair FNS Plus
• Pentair Quad D.E.
• Pentair SM and SMBW 4000 Series

Compatibility can vary by filter model, tank style, and production date. Refer to the filter label or Pentair replacement-parts diagram before purchasing.

Common Reasons for Replacement

Replacement may be needed when the existing valve has:

• Water leaking around the valve body
• A cracked or damaged housing
• A relief handle that is difficult to turn
• A blocked or restricted air outlet
• Damaged threads
• A valve that will not seal after bleeding air
• Weather or chemical deterioration
• Missing or damaged components

Installation Information

Turn off the pool pump and disconnect power before servicing the filter. Confirm that system pressure has returned to zero before removing the existing assembly.

Remove the old valve carefully and clean the mounting area. Install the replacement assembly using the appropriate seal or O-ring for the filter configuration. Do not overtighten threaded components.

After installation, open the air-relief valve and start the pump. Leave the valve open until a steady stream of water exits without air. Close the valve securely and inspect the assembly for leaks.

Never remove or service the air-relief valve while the filter is pressurized.

Confirm Before Ordering

Please verify:

• Your required part number is 98209800
• Your filter is a compatible Pentair model
• You need the complete air-relief assembly
• The filter is not pressurized before installation
• The mounting connection matches the existing valve
• Any required O-ring or pressure gauge is included or available separately

Warranty Information

This genuine Pentair replacement part is covered by Pentair’s applicable limited manufacturer warranty against qualifying defects in materials and workmanship. Damage caused by excessive pressure, improper installation, freezing, chemical exposure, impact, or overtightening may not be covered.

Customer Q&A

Q: What does this valve do?
A: It releases trapped air and allows the filter to be depressurized before maintenance.

Q: Is this a genuine Pentair part?
A: Yes. Part 98209800 is a genuine Pentair OEM replacement assembly.

Q: Does it fit Clean & Clear Plus filters?
A: Yes, it fits compatible Clean & Clear Plus models.

Q: Does it require electricity?
A: No. It is operated manually.

Q: Can it be removed while the pump is running?
A: No. Shut off the pump and confirm the pressure gauge reads zero before servicing the valve.